msem-instigator

Alpha (You may have this creature enter with a +1/+1 counter on it. If you do, it becomes alpha and can only attack alone.)
Vigilance

Draw two cards. Then discard a card unless you control an embattled creature. (A creature is embattled if it has a counter on it or has a permanent you control attached to it.)

Valley Falls enters tapped unless you control two or more white and/or blue permanents.
{T}: Add {W} or {U}.

Whenever a creature you control attacks, you may sacrifice a Treasure. If you do, that creature can't be blocked this turn.

When Wilting Waif dies, each opponent discards a card at random and you scry 1. (To scry 1, look at the top card of your library. You may put that card on the bottom of your library.)

Target opponent separates all creatures into two piles. You choose one of those piles. For each creature in the chosen pile, its controller sacrifices it.

Lifelink
Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)
Whenever Spoiled Oracle mentors a creature, that creature gains lifelink until end of turn.

Return up to one target creature card from your graveyard to the battlefield tapped. You gain 2 life.
Tether (Then if you cast this from your hand, you may exile it tethered to a creature you control. When it dies, you may cast this from exile without paying its mana cost.)

This spell costs {2} less to cast if you cast it during your main phase.
Tap up to two target creatures. Put a stun counter on each of those creatures.

Flying, trample
Nether Fiend enters with a lifelink counter on it.
{B}{B}, Pay 6 life, Remove a lifelink counter from Nether Fiend: Draw six cards.

Spirited (When this creature enters, you may activate one of its activated abilities without paying its cost.)
{4}{G}: Target creature gets +2/+2 until end of turn.

Tears of Samang deals 3 damage to each creature and each player. If an opponent would be dealt damage this way, you may have Tears of Samang deal 3 damage to a planeswalker they control instead.

{T}: Mill three cards. Scry 1.
{1}, Sacrifice Consecrated Altar: Counter target spell or ability that targets you or one or more cards in your graveyard.

Scry 3. If you control a Wizard, draw a card.

Return target creature card from your graveyard to the battlefield, then rediscover a creature card. (Look at the top card of your library. You may reveal it and put it into your hand if it's a creature card. Otherwise, put it back or into your graveyard.)

This spell can't be countered.
Piercing Arrow deals 4 damage to any target.

Flying
Sacrifice a Fungus, Saproling, Plant, or Insect: You gain 2 life.

Flash
If a nontoken creature you don't control would enter and it wasn't cast, exile it instead.
When Paragon of Honor leaves the battlefield, return each card exiled with it to the battlefield under their owner's control.

Deathtouch, menace
Slayer of the Famed must be blocked each combat if able.

Breach (Whenever this deals combat damage to a player, you may have it become an Aura Curse until your next turn. Attach it to that player.)
Recursive — As long as Mayar, Nullcrowned is a Curse, they have all nonrecursive abilities of other Curses and creatures with breach you control.
Pay 3 life: Target enchantment creature gains haste and menace until end of turn.

Reveal the top five cards of your library. Put one of those cards into your hand. Target opponent chooses two of those cards. Exile the chosen cards, then put the rest into your hand.

Enchant land
Enchanted land has “{W}, {T}: You gain 2 life.”

Improve {1}{U} ({1}{U}: Put a +1/+1 counter on this creature. This costs {1} more to activate for each +1/+1 counter on it. Improve only as a sorcery.)
At the beginning of your end step, if one or more embattled creatures you controlled dealt damage to a player, you may draw a card. (A creature is embattled if it has a counter on it or has a permanent you control attached to it.)

Instant and sorcery spells you cast cost {1} less and an additional 1 life to cast.
You control your opponents while instant and sorcery spells you control are resolving.

Enchant opponent
Whenever enchanted player is attacked, up to one target attacking creature gains menace and lifelink until end of turn.